We provide you with a list of the accounts billed per invoice in your usage report.
You can find this via a link on your invoice or in your Adspert account, for download as XLS or CSV, for your internal processing.
To access it via your Adspert account, read the following article:
https://support.adspert.net/en/articles/4715236-where-can-i-find-my-invoices